Mercurial barometer



A. M. KRAUSE. MERCURIAL BAROIIIIETEB.

APPLICATION FILED MAY 23,4918. I. y I

' Patentesept. 21, 1920.

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A. M. KRAUS'E. MERCURIAL BAROMETER.

APPLICATION mm MAY 23, 191s.

' Patented Sept. 21, 1920.

2 SHEETFSHEET 2.

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' r The extreme lower end 7 of the coliujnn 5 i .lower end ofthe barometer; V35

unirse stares ARNDT ivi. KRAUSE, OF CHICAGO, ILLINOIS,v nssICrNoR To CENTRAL SCIENTIFIC COM- PANY, OF CHICAGO, ILLINOIS, .a CORPQRATIONOF ILLINOIS.

`Ifirimiunan BAROMETEN.

'Tofallw from t may concern Be it known that l, ARNDT M. KnAUsE, a citizen of the United States, res'id1ng at Chicago, :in the county oflCoolr and State of Illinois, have invented certain new and useful Improvements in Mercurial Barometers, of which the` following is a specification. l, Y* I* i This invention relates to mercurial barometers and has for lits obj ect the provision ofia barometer in which the column is` separate fromithe cistern and isconnected there! to by means which insures easy adjustment 'in use and safetyin transportation.

. `15 Y .A I i @provision'loffa barometer .in which the cis- ;tern is bodily adjustable relatively to the further objecty of my inventionis the column.

vention reside in the provision of means for protectingthe:glasscistern and in ther various combinations hereinafter described as will .bebetter understood by reference to the following specification when read in connectionA bwith the' accompanying drawing illustrating v the preferred embodiments thereof7 in whichf'- Figure` 1 is an elevation of a barometerA Y accordingy to my inventionwitlr parts broken away for' betterY illustration;

. `Fig.- 2 isa vertical section th rometer; 1., Fig.'r 3 isi a view in perspective ofthe ough the bla,-

isa section on the line' 1-41 of Fig-1.1;: n: f y

'Fig. 5 isV an elevation. of -aslightl-y `different form ofthe barometer;

Fig. 6'V is l an enlargedsectional view throughthe cistern;

Fig.-7 -is a view in perspective of the col-V umn and cistern,A and Figa 8 is adetail in perspectivey of the v metal tubel surrounding the column and vthe shield for the cistein.

'Referring to Figs. 1 to- -ofthe drawing', 5 indicates the column consistingof Ya glass tube of uniform bore and sealed at itsupper end in v the usual manner. end of the column 5 is disposed within and Vsecured to a collar 5 of suitable. material. in

the presentinstance preferablyvMonel metal.

Specification of Letters llatent.

. tact of lthe ivory TheA lower iqareferaliy constricted aslindicated inthe nected at its'upper end preferably by means of plaster of Paris 9 to an annular member Patenteasepe 2i, 1920. implicati@leali/rayV 23, 1918.` seriai 110,236,078. l Y

10 which is4 mounted on and threadedly engages the collar 6. A washer 11 of felt'or other Ysuitable material is disposed on the A upper surface ofl thev annular ymember L10 Vwith its inner edge engaging the threads on the collar .6 to prevent the escape of mercury 12 from7 while permitting air to enter and leave, the cistern.` The lower end of the cistern 8 is inclosed within a Ametal shell 13,

preferably of brass, provided with a knurled` f l end forming a head` to protectthe cistern to facilitate itsadjustment 'The space 'befr L tween the shell 13 and thecisternislled Further. Yobjects'and advantages of my inwith plaster. of' Paris which secures; :the

shell and cistern inV assembled relation. The

usual ivory'point 1 6 is mounted in the lower end of themcolla'r 6to engage thesu-rfaceV of lthe mercury. 'A cylindrical shield 17,'pref-` erablyof brass, issecured'to the collar 6 Windows 18y are providedin oppositezsides of ythe cylinder 17Y throughwhichthe con-' d may. be observed.

point 16 with tliemercury A metal' tube Y19'whicliinthe emv-nbodiment isl heiragonal .in form, surrounds provided-'attits upper end with a cap 20 in which swivel hanger 21 ismounted. lThe tube 19-is secured at itslower end to the collar. fbyscrews 22 and at its upper end to The tube 1 9 is provided; with v."oppositely disposed vsight-openings 25 andy the usual scales 26; are secured :tothe tubeA 1`9by screws the. column 5l throughout its length and is the cap 20j by screws 23. jPreferably, an "f 27. A verni'er 28 is mounted-between the .adjacent edges of thescales 26 andf'is held in assembled lrelationxtherewith by a, spring 29-disposed-Mwithin the tube 19 with its ends Y.in engagement with the inner faces of. the

walls thereof. The spring29- is mounted on i f pinfBO4 which extends through the Vernier: Vanglais provided witlia lrnobfladaptedtoi fi be grasped by :the operator to move the vernier along the scales 26. The spring 29 provides frictional contact which holds the Vernier in any adjusted position and permits easy adjustment thereof. Y

As will beA readily understood the instrument is adjusted by grasping the knurled end 14 and rotating the cistern on` thethreaded collar 6, until the ivory point 16 touches the surface of the mercury l2. This adjustment is very simple and it will be noted that the entire cistern is adjusted relative to the column 5, thus obviating the necessity of providing flexible bags orpistons as has been usual ink well known types of barometers now in common use.

'Referring to Figs. 5 to 8 of the drawing indicates the column consisting of a glass tube of uniform bore and sealed at its upper end'in the usual manner. The lower end of the column 35 is disposed within a collar 36 of suitable material such as liber of vulcanite. The extreme lower end 37 of the column is constricted to permit the insertion of cement 38 which securely fastens the collar to the column.

A cistern 39 preferably of glass is connected at its upper edge by cement 40 to an annular member 41 which is mounted on and threadedly engages'the collar 36. The lower end of the cistern 39 is provided with a head 42. YA washer 43 of felt or other suitable material `is disposed in a suitable recess in the top of the annular member 4i.

The usual ivory point 4'5 is mounted in the lower end of the collar 36 to engage the sur-- face of the mercury.

A metaltube 46, hexagonal in form, surrounds the column 35 throughout its length and isrprovided at lits upper vend with a swivel'hanger and cap 47. The -lower end of the tube 46 is provided with a plurality of'tongues 48, the'inturned ends of which are adapted to engage a gro/ove 49 in the upper end of the collar 36 above a flange 50 thereon. The tongues 48 bendoutwardly above the inturned ends and a shield 5l is slidably mounted on the tube and'adapted when forced lto the position indicated in Fig. 6 to move the tongues 48 inwardly causing the inturnedvends `ofthe latter to Aengage the groove 49 and firmly lock'the tube tothe collar 36.` The shield 5l in addition to its locking function surrounds the collar 36 andthe upper portion of the cistern 39 giving a finished appearance to the' ment by grasping the head 42 and rotating the cistern on Vthe threaded collar 36 until the ivory point 45-touches the surface of the mercury 44. This adjustment is very simple andit will -be noted that the entire cistern is adjusted relative to the column 35, thus obviating the necessity of providing flexible bags or pistons as has been usual in well known types of barometers now in common use. Y

My invention greatly improves the mechanical construction of the particular type of barometers to which it relates and facilitates shipment of the barometer withoutl danger of breakage. It hasbeen customary in the past to 'support the cistern on the column and Vdue to Vthe weight of the mercury much loss has been occasioned by breakage in shipment. I have overcome this by supporting the cistern independent of the column and protecting it so that loss by breakage lhas been reduced to a minimum. For the purpose of shipment the cistern is adjusted to the limit of its yupward movement in which position it is protected bythe shield 17. v For actual ,j use the cistern can be conveniently adjusted relative toV the vcolumnas required and the' liability of wear "on the' cistern asin the ployed, is entirely avoided.

Iam aware that Y hanges in the form, con'- 'i struction and arrangement of parts ofmy invention ma be made without departing from the spirit orr sacrificing the advantages thereof and I reserve the right'to'make allV such changes as fairly fall within'the spirit 'l and scope of the following claims.. j Iclaim: "fj l. VA mercurial' barometer comprising a column, a collar on the column adjacent the portion, a shield on the lcollar surrounding said threaded portion, a cistern inclosing the lower end of the column, an annular'member 'supporting said cistern and adjustabl lower end thereof and having-"a threaded t" mounted on the threaded'portion of the co larY within said shield, and a protecting shell onthe lower portion of thecistern coi i operating with the shield to inclos'e and protect the cistern.

2. A mercurial barometercomprising a lower end of the column, an annular member supporting said cistern and adjustably mounted on the threaded portion of said collar within said shield, and a shellV in-v closing the lower portion of the cistern and n telescopingly engaging the shield. i

3. A mercurial barometer vcomprisingaV column, a collar on the column adjacent the lower end thereof, and having'av depending 130 Y 1,353,482 f Y f 18.

Y ber supporting the oistern' and adjustably mounted on the threaded portion of the colf ler,` a tube surrounding the column aboveV the collar and having a plurality of tongues at its lower end to engage the collar, and a shield inolosng seid annular .member and extendingrdown approxirnatelyV to 'the bot- ,Y Y tom of the threaded portion of the Collar 10 and engaging said tongues to hold; them in operative engagement with the'oolletr.v

. ARNDT'M. KRAUSE.l Witnesses:

A. B. CARTER, Z. Coma.v Y 

